The Book of Greetings
39/15. Chapter:
The Prohibition Of Two People Conversing Privately To The Exclusion Of A Third Without His Consent
Sahih Muslim
وَحَدَّثَنَاهُ إِسْحَاقُ بْنُ إِبْرَاهِيمَ، أَخْبَرَنَا عِيسَى بْنُ يُونُسَ، ح وَحَدَّثَنَا ابْنُ أَبِي عُمَرَ، حَدَّثَنَا سُفْيَانُ، كِلاَهُمَا عَنِ الأَعْمَشِ، بِهَذَا الإِسْنَادِ .
This hadith has been reported on the authority of A'mash with the same chain of transmitters.
Reference : Sahih Muslim 2184cIn-book reference : Book 39, Hadith 52USC-MSA web (English) reference : Book 26, Hadith 5423